Re: Replacing the default ClearCase merging and comparing tool

There is no supported mechanism to replace the merge tools on a per-user basis when those users are all using the same client host.

Well, almost... You can try updating to ClearCase 8.0 and check to see if the compare/merge options in ClearTeam Explorer would fulfill your needs. This would be a GUI-only -- and in fact ClearTeam-Explorer-specific -- change, but it may do what you need.